I see what you're trying to say here, but I still think you're just wrong on this particular point. It's not that you can't remove the over the top violence because they're adventure or fighting games, but you can't remove the violence because of what those SPECIFIC game franchises are. That's their point of differentiation. There are other fighting games out there, but the thing that makes Mortal Kombat unique is that extreme violence. Take it away and you have just a generiic fighting game. Same with God of War. Take away the extreme violence and there's not much that's really special about it. At least the original games. The new games still have that gritty, intense violence as a fundamental part of them, but they do actually think about that violence more, and mete it out with more consideration. Each game was built from the ground up with violence as their focus, thinking about how to step up the violence and make it as impactful as possible at every point. Sex in BG3 isn't anywhere near as central to the identity of the game. If you took sex out of it entirely, then structurally the game really wouldn't feel that different. It's not going to leave the game blank and generic because you still have the breadth of choices, the deep systems and reactivity, the classes and ruleset, etc. Violence is built into every aspect of GoW and MK, sex and sexuality isn't built into every aspect of BG3. I think removing the violence from those games would be more akin to removing BG3s reactivity. That's the part of the game that Larian built everything in consideration of.
I think that if you took away ROMANCE from BG3, that would change the game far more fundamentally than if you took away sex from it, and I believe the two are connected, but not automatically so. Also, I just in general don't think Larian put that much thought into how they approached sexuality in this game. I don't think Larian put that much thought into a lot of stuff they put into the game. They seem to have a hard time saying no to ideas, and on every level of the game, they shoved stuff in because they thought it was cool without really considering if it would be an actual benefit.